Room-temperature Van Der Waals Ferromagnet Switching by Spin-Orbit Torques.

Emerging wide varieties of the van der Waals (vdW) magnets with atomically thin and smooth interfaces holds great promise for next-generation spintronic devices. However, due to the lower Curie temperature of the vdW ferromagnets than room temperature, electrically manipulating its magnetization at room temperature has not been realized. In this work, we demonstrate the perpendicular magnetization of vdW ferromagnet Fe 3 GaTe 2 can be effectively switched at room temperature in Fe 3 GaTe 2 /Pt bilayer by spin-orbit torques (SOTs) with a relatively low current density of 1.3×10 7 A/cm 2 . Moreover, the high SOT efficiency of ξ D L ∼ 0.28 ${\xi }_{DL}\sim 0.28$ is quantitatively determined by harmonic measurements, which is higher than those in Pt-based heavy metal/conventional ferromagnet devices. Our findings of room-temperature vdW ferromagnet switching by SOTs provide a significant basis for the development of vdW-ferromagnet-based spintronic applications. This article is protected by copyright. All rights reserved.